Woman in the Dunes movie plot

A biology teacheris doing fieldwork in the desert, but accidentally misses the return bus and is trapped in a small village in the desert. He settles in the house of a widow, and after being entertained, he finds that the road to the outside world has been blocked. He slowly observed various oddities in the village. For example, all the villagers had to shovel sand every night to prevent the houses they lived in from being buried by the sand. All water was regulated and rationing was implemented. The widow who took him in began to tempt him with her body and tried to form a family with him. He tried to escape several times and failed, so he had to pretend to be a fool on the surface and entered the village to work regularly and enjoy the ration life mode, but he was always trying to escape. Intend. One day, the widow suddenly fell ill and was diagnosed with an ectopic pregnancy by the doctor. Everyone rushed to take her to the doctor. The man finally had a once-in-a-lifetime chance to escape   .